// Copyright (c) 2010 Nickolas Pohilets
//
// This file is a part of the CppEvents library.
//
// Permission is hereby granted, free of charge, to any person obtaining a copy
// of this software and associated documentation files (the "Software"), to deal
// in the Software without restriction, including without limitation the rights
// to use, copy, modify, merge, publish, distribute, sublicense, and/or sell
// copies of the Software, and to permit persons to whom the Software is
// furnished to do so, subject to the following conditions:
// 
// The above copyright notice and this permission notice shall be included in
// all copies or substantial portions of the Software.
// 
// THE SOFTWARE IS PROVIDED "AS IS", WITHOUT WARRANTY OF ANY KIND, EXPRESS OR
// IMPLIED, INCLUDING BUT NOT LIMITED TO THE WARRANTIES OF MERCHANTABILITY,
// FITNESS FOR A PARTICULAR PURPOSE AND NONINFRINGEMENT. IN NO EVENT SHALL THE
// AUTHORS OR COPYRIGHT HOLDERS BE LIABLE FOR ANY CLAIM, DAMAGES OR OTHER
// LIABILITY, WHETHER IN AN ACTION OF CONTRACT, TORT OR OTHERWISE, ARISING FROM,
// OUT OF OR IN CONNECTION WITH THE SOFTWARE OR THE USE OR OTHER DEALINGS IN
// THE SOFTWARE.

#include <intrin.h>

#pragma intrinsic (_InterlockedIncrement)
#pragma intrinsic (_InterlockedDecrement)

namespace Cpp {
//------------------------------------------------------------------------------
class AtomicInt
{
public:
	AtomicInt(int x = 0) : ref_(x) {}

	bool isNull() const { return !ref_; }

	void retain() { _InterlockedIncrement(&ref_); }
	bool release() { return !_InterlockedDecrement(&ref_); }

	int value() const { return ref_; }
	void setValue(int x) { ref_ = x; }
private:
	volatile long ref_;
};
//------------------------------------------------------------------------------
} //namespace Cpp
